Abrading device



April 1935- I A. s. SORENSEN 1,998,259

, ABRADING DEVICE F'i'i ed' Sept. 17, 1952 "2 Sheets-Sheet 1 06/2 M15. 301%7q5e724 P A. s. SORENSEN 1,998,259

ABRADING DEVICE Filed Sept. 17, 1932 Sheets-Sheet 2 java M504 Patented Apr. 16, 1935 UNITED STATES PATENT OFFICE V '1,998,259"' 1 ABRAniNGnnvIoE 7 V Arms; 8. Sorensemmnaha, Nebr. Atacamsepemta 17,. masses m mo dclaimsf (01.51413) 4 This invention relates to abrading devices as is an improvement on the co-pending applications of Jake M. Stivers, Serial NU. 568,965, filed Janu-' my 15, 1931, and Serial No; 623,881, filed Julyzl,

One of theobjects of my invention is to provide improved meansfor holdin'g'any one of the three stones desired in horizontal position during use; 'Another object is to provide an improved cone struotion of rotor or holder for supporting the sharpening stones. i

:StilIa'furthe'r object is to provide improved means'for rotatably mounting therotor in. a receptacle containing oil, with means for tightening the rotor'against rotation/and yet permitting loosening of the same suflicient to permit rotation of the rotor when it is desired to eitherplace-anting a knife or the like tosharpen the same,

but such method consumes'considerable time,'and is rendered more difiicult'by the accumulation of grease or other foreign particles on the face'of the stones that tend tofill up the pores of the stone and cause the face or the latter to become glazed over, and of such. degree of slickness as to very greatly impair its sharpening efficiency. '7 My improved apparatus, in common with the Stivers applications referred-to above, contemplates the mounting of a plurality er sharpening stones upon a rotor, whichroton is rotatably mounted in a receptacle of' suchnature that' it will hold, without lakingga quantity of oil in which the stones willibe immersed as they are rotated, and in addition to being kept in good.

ceptacle; which oil should be of a penetrating "nature such that it will penetrate the poresxof the stone and function effectively in washing any 7 foreign particles from'th'e surface of the stone.

'just inside and closely adjacent the metal plate My improvements-over the said Stiversapplications will become more readily apparent from the;following' specification.

Other objects, advantages and capabilitieswill' latermore fully appear.

My invention further resides in the combination, construction and. arrangement of parts ,illustrated in the accompanying drawings, and while I have shown therein a preferred embodi.' men't,;I wish it understood that the same is susceptible-of modification and. changewithout departing from the spiritof my invention.- A, j Inithe drawings: I a f Figure l is a side-elevation of the receptacle in which the rotor and stones are mounted with thecove'r in place, aportionoi the right-hand. side of the receptacle, being broken away to show the rotor andstones mounted'therein.

Fig. 2 is a perspective view-of thereceptacle with thecover removed and with one of the stones fastened in horizontal position ready for use. Fig. 3 is-a perspective view of the rotor with the stones mounted thereon. Fig. 4-is a perspective view of the ,rotorpwith the stones removed. I 5,

Fig. 5.:is a perspectiveview of one of the sharpening stones with'a'sheet of cardboard or the like referred to later, slightly removed from the bottom face. and showing the clamping plate slightly removed from one end., i a 30 Fig-"6 is a vertical longitudinalsection with the cover shown in dotted lines. 7

Fig. 7 is a vertical transverse section taken on the linela-T of Fig. 6 and looking inthe direction ofthe arrows.

Fig. 8 is a vertical transverse section taken on the line 8-3 of :Fig. 6 looking in the direction of the arrows.

Referring in detail to the drawings, the rotor or holder upon which my abrading stones are carried is rotatably mounted in the receptacle I; upon which is removably positioned the cover 2 for preventing entry of. dust, dirt and the like into the oil in the receptacle, when the device is not in use. a I

- Spot Welded or otherwise fixed in the ends of the receptacle (one in each end) are the metal plates 3 and 4, the upper edges 5 of each of these plates being slightly bent inwardly toward the rotor to form a clamping edge on its inner face, which-cooperates with and engages over any one of the-shoulders 6 of plate'l, 'which'isspot welded or otherwise fixed to the end plate is of the rotor 3, "'Asseen in Figs. 2 and 6,- plates'3 and 4 are provided with slots 9 and I0, which receive the reduced portions II and I2 of the trunnions securedly fixed, one at each end of the rotor I3.

The trunnion carrying the reduced portion I2 is secured to the end wall I5 of the rotor I3 by riveting the head It to the adjacent portions of the end plate I5, there being a hole provided through said end plate through which the reduced portion I6 may be passed prior to the riveting of head I4. This may be also further secured by spot welding if desired. Just outside of the reduced portion I2 is an enlarged portion II, which carries the enlarged knurled rotating handle grip 3| referred to later herein (see Fig. 6).

The other end wall I8 of the rotor has an opening through which passes the reduced portion I9, after which the head 20 is riveted into place. Just outside of the opening through which the reduced portion I 9 passes isa flange 20 to prevent.

movement of the trunnion I I into the rotor. Trunnion I I as shown in Fig. 6 is'screw threaded to receive the nut portion 2 I, which upon rotation in the proper direction, causes the flange 5 tobe tightly held to overhang the adjacent shoulder 6 to hold the rotor against rotation. As seen in Fig. 3, there being provided three stones, there will also be provided a like number of shoulders 6 extending parallel to the top face of the adjacent stone, and whichever one of these shoulders 6 is uppermost will be the one in clamping engagement with the flange 5. As will be readily understood, the tightening of nut 2 I will draw the rotor longitudinally to the left in Fig.6 to bring about the locking engagement between flange: 5 and shoulder 6.-

When it is desired to rotate the rotor to bring one of the other stones uppermost, all that is necessary is to loosen nut 2| a sufficient distance to free shoulder 6-. from flange .5, and then turn the rotor to bring the desired stone into uppermost horizontal position. I

As-will be seen from what has gone before,the opposite end of the rotor is supported in slot II) by the reduced portion I2 of the trunnion, at that end of the rotor. This reduced portion I2 is of sufiicient length to permit a reasonable amount of longitudinal movement of the rotor in receptacle I to permit tightening and loosening of the rotor by nut 2 I When it is desired to remove the rotor from the receptacle, all that is necessary is to loosen nut 2| a suflicient amount and lift the rotor out of the receptacle.

The construction of the rotor will now be described. Extending between the end walls vI5 and I8 in the rotor and spot welded or otherwise secured thereto are the metal plates*22, each provided at each end with flanges 23 and 24, and upon which flanges and the end walls the spot welding or other securing means is applied. Prior to fastening these plates 22 in position between the end walls, the trunnions are properly secured in place in the end wall members. plates 22 are secured to the end'walls as just pointed out, this will provide a rotor of triangular shape having a trunnion at each end to be inserted in the slots 9 and III. The abrading stones 25 are then laid in place on the plates 22, the stones being of such length to just neatly fit within the flanges 23 and 24, with suflicient room between the end of the stone andfiange 24 to slidably receive the metal strip 26., Prior to placing the stone 25 on plate 22, a strip of cardboard or other porous materialZ'I is applied to plate 22 to lie between said plate and the stone,

in order that the penetrating oil in receptacle I When the may penetrate through the cardboard or other porous material, and thus more readily find its way to the under face of the stone to saturate the stone with oil.

As seen in Fig. 6, a suitable opening is drilled through end plate I5 and flange 24 and provided with threads to receive the set screw 28, on rotation of which set screw the stone will be clamped between the metal plate 26 and flange 23 of plate 22.- Each. of the other stones is fastened to its respective plate 22 of the rotor in a similar manner. Each of the other plates 22 are also secured to the end walls I 5 and I8 of the rotor in a manner similar to that described above.

' Receptacle I has oil placed therein to a suitable height, as for example to come to the level indicated by the line 30, or more or less as desired, the amount of oil being such as to keep the stones saturated and to wash off any foreign particles from the cutting face of the stone as the stones are moved through the oil by rotation of the rotor. i

It is also to be noted that when nut 2| is loosened, the knurled cylindrical portion 3I on the right hand end of Figs. 6 and 7 may be used for rotating the rotor to bring the desired stone into uppermost position for use. It is also understood that the sharpening stones will be of varying fineness, as for example, one being rathercoarse for .the first sharpening operation, the second one somewhat finer for a medium operation, and the third one. of suflicient fineness to finish the. sharpening operation. -In use the operator will draw the blade to be sharpened back and forth over the faces of the stone until thedesired sharpness is attained.

Having now; described my invention, I claim:

1.. In an abrading devicecomprising abrading elements and a support therefor, a rotatable holder for said elements comprising a pair of spaced end plates and three side plates each provided at each end with a flange, each of said flanges being secured to one of said .end plates with the side plates triangularly arranged to present three: faces with an upstanding flange at eachend. s

' 2. In an abrading device comprising abrading elements and a support therefor, a holder for said elements comprising a pair of spaced end plates and side plates connecting said end plates and for supporting said abrading elements, upstanding flanges at. each end of the holder and each flange secured to one of said end plates with the side plates arranged to present three faces with an'upstanding flange at each end, said abrading elements seating against said side plates and secured between said upstanding flanges.

3. In an abrading device comprising abrading elements, a receptacle for containing oil for lubricating saidelements, a holder for carrying said elements and including a pair of spaced end plates, three side plates each provided at .each end with a flange, each of said flanges being secured to one of said end plates with the said side plates triangularly arranged to present three faces with an upstanding flange at. each end, a trunnion secured in each oftheend plates to; furnish journals for mounting the. holder in the support, an abrading elementsecured between the end flanges of each of said side plates,

which an edge of said plate contacts for retaining the holder in an adjusted position.

4. In an abrading device comprising abrading elements,a receptacle for containing oil for lubricating said elements, a holder for carrying said elements and including spaced end plates, members connecting said end plates and adapted to support said abrading elements at an angle to one another, upstanding projections on each end plate and the connecting members arranged to present three faces with one of said upstandprojecting from each end plate, an abrading elementsecured between the upstanding projections on said end plates and seating upon said connecting members, and means for retaining said holder in a predetermined position, said means comprising a triangular-shaped member adjacent an end plate and adapted to engage a projecting portion of saidgreceptacle whereby said projecting portion will prevent rotation of said holder.

. ARTHUR S. SORENSEN.

ing projections at each end thereof, a trunnion r 

